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8N Rear hub lock nut wire

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Angus Thom

06-07-2020 14:56:54

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Following "Stop when it squeaks?" post of 5/23 - I pushed hub back on and the splines of the axle were darn close to flush w/ the hub, tightened to 450 ft-lbs then backed off to get lock-ring wire into keyseat. Mowed 30 minutes and found nut had loosened up - lock wire no longer engaged in keyseat. Is this normal?
Considered 2 piece locking nut to really hold it - but then decided to "do it right" - new hub on order - but - forewarned by tip 54/75 - I knew the brake drum screws that haven't seen the light of day for 30 years would be an issue for my limited expertise & toolset. Turns out they were less than finger tight!
Two questions for the forum -
am I right to tighten to 450 and then back off to align nut hole and keyseat? Seems obvious - but backing off just doesn't seem right. If I use the 2 piece lock nut, what is the little brass key that comes with it for? TIA Angus

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Angus Thom

06-25-2020 07:12:59

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 Re: 8N Rear hub lock nut wire in reply to Angus Thom, 06-07-2020 14:56:54  
Stripping the threads is a worry for me too - as the old nut didn't just slowly unscrew - it simply disappeared, a magic trick that left scars on 30 yr old axle threads.

Anyway - new hub on and 450 ftlbs happened to align nut w/ keyway - so clip is all the way in this time. Put dab of white paint on nut and on axle so that I can quickly see any rotational movement. Thought a couple of pictures might be interesting.

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06-25-2020 04:42:39

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 Re: 8N Rear hub lock nut wire in reply to Angus Thom, 06-07-2020 14:56:54  
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In fact I leave the lock wire off for a bit. No matter how tight you make it, after some driving around they need re-tightening. Then again, then again. After they don't need anymore, then put the lock wire on.

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06-24-2020 18:53:17

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 Re: 8N Rear hub lock nut wire in reply to Angus Thom, 06-07-2020 14:56:54  
I have a 40" bar that I attach to the socket that just fits the nut. My worry is to strip the threads. I did strip the threads a month or so ago when I saw oil leaking out the axle. I just replaced that axle and tightened it up with the thought, "Don't strip the threads!"

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06-07-2020 18:29:51

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 Re: 8N Rear hub lock nut wire in reply to Angus Thom, 06-07-2020 14:56:54  
back off to align nut hole
NO!!!! That's where you fudged up give it another shot...
I spec when I nail them down I am in the 600 feet lb range in other words 220lb doing a a little hop on a 3/4 ft bar...

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